The war finds its second chokepoint
The war finds its second chokepoint
Two days ago this desk flagged the Bab al-Mandeb as the least-covered escalation vector on the board — the strait one decision away from mattering. On Monday the Houthis declared a maritime blockade of Saudi Arabia, Riyadh vowed to answer with force, and the southern gate stopped being hypothetical. With Hormuz already throttled, the arithmetic is now stark: close both gates and a quarter of the world's oil and gas has nowhere to sail.
What changed
Houthi military spokesman Yahya Saree announced on Monday an immediate maritime embargo on Saudi Arabia, framed on the principle of "an eye for an eye" and a right to answer a blockade with a blockade. The declared trigger was last week's strike on Sanaa airport — which Yemen's internationally recognised government claimed, saying it was preventing an Iranian aircraft from landing — followed by Houthi missiles fired at Saudi Arabia's Abha airport, the first such exchange in years and a direct strain on the truce that has held since 2022. Saudi Arabia's foreign ministry issued its strongest condemnation, and the Saudi-led coalition said it would respond to threats against its ships with force, adding that it had already begun protection measures for vessels transiting Bab al-Mandeb.
The reason a Yemeni embargo reverberates through global energy is the map. The Bab al-Mandeb narrows to about 29 kilometres, and roughly 7.4 million barrels of oil per day moved through it in June — about seven per cent of world supply. It is also, now, Saudi Arabia's main escape hatch: with Hormuz throttled, the kingdom has pushed its exports onto the East-West "Petroline" to the Red Sea port of Yanbu, whose loadings have quadrupled to around four million barrels a day from under a million a year ago. Al Jazeera's own reckoning is blunt: with Hormuz effectively shut since February, closing Bab al-Mandeb as well could block a quarter of the world's oil and gas. The desk's earlier framing holds — the strait is more likely to be taxed than sealed — but the taxing has begun.
The blind spot, on schedule
This is the escalation this desk named on Sunday as the board's least-priced vector, and detailed the mechanics of the same day: the Houthi second front was the one move that could turn Saudi Arabia's Hormuz workaround into a second trap, because the Yanbu route the kingdom now depends on runs straight through the strait the Houthis just threatened. The forecast is on the record and dated ahead of the event; that is the whole point of the exercise. What matters now is not the vindication but the next fork — whether the declaration becomes enforcement, and whether Washington has an answer for the gate it was warned about.
Does Washington have a plan for the second gate? On paper — but the ships are pinned and the command post is battered
The reassuring half of the answer is that a structure exists. Combined Task Force 153, run out of the Bahrain-based Combined Maritime Forces partnership, was built specifically to secure the Red Sea, Bab al-Mandeb and Gulf of Aden, and when the Houthis last throttled the strait in late 2023 it became the backbone of Operation Prosperity Guardian, a multinational escort mission fronted by US destroyers and a carrier. The US also garrisons the chokepoint at Camp Lemonnier in Djibouti, its largest base in Africa. On paper, the contingency is written and the doctrine is proven.
The problem is that almost none of it is actually free. The carriers that would anchor a Red Sea escort are not in reserve — satellite imagery places both US flat-tops, including the USS George H.W. Bush, on the blockade line in the Gulf of Oman, pointed at Iran. The escort playbook itself has already been tried in these waters and stalled: Operation Project Freedom, Washington's May attempt to convoy merchant ships through Hormuz, was paused within a day after Iranian boats and missiles bloodied it. And the command node for any Bab al-Mandeb operation is under fire — the US Navy's Fifth Fleet headquarters in Bahrain, the parent of Combined Maritime Forces whose remit expressly covers the Red Sea and Bab al-Mandeb, has been struck repeatedly since February, with satellite analysis showing damage to command centres and a dozen buildings and NAVCENT at one point declaring the surrounding district unsafe for its own personnel. The main regional air hub at Al Udeid in Qatar has taken building damage too. So a surge to the southern gate would not draw on spare forces; it would rob the Hormuz blockade of ships, run an escort model that already faltered once, and be directed from a battered headquarters.
Even setting all that aside, 2024 is the control experiment for the ceiling of the plan. Even with a coalition escorting convoys and shooting down drones, Prosperity Guardian did not keep the strait open for commerce — BP, Maersk and Hapag-Lloyd pulled their ships and rerouted thousands of miles around the Cape of Good Hope anyway, because a cheap drone can close a sea lane that an expensive destroyer cannot force open. The deeper truth from the explainer two days ago stands: if the strait closes, the American answer is not to force it open but to absorb the reroute — the Cape detour, strikes to degrade Houthi launchers ashore, and, if prices spike, strategic-reserve releases. A plan on paper, yes. Spare capacity to execute it, barely.
Timing ladder — the week's live dates
- Tue 21 Jul: Trump hosts Lebanon's President Aoun; ASEAN foreign ministers convene in the Philippines and are expected to press for reopening Hormuz.
- Wed 22 Jul: EU ambassadors weigh a fresh Russia sanctions package; new 25% US tariffs on Brazilian goods take effect; Venezuela's Maduro expected to be charged in a New York court.
- Thu–Fri 23–24 Jul: Shanghai Cooperation Organisation foreign ministers meet; the ICC states-parties hold a special session on its chief prosecutor.
- 29 Jul: Federal Reserve decision under Chair Warsh — July's oil shock does not reach CPI until mid-August, keeping a pre-emptive move live.
- ~5 Sep: expiry of the 60-day War Powers clock Trump started on 10 July.
Meanwhile, off the war desk
The wider board keeps turning. The United Kingdom has a new prime minister; Ukraine is seeing rising domestic political unrest; and Washington's week is unusually loaded beyond the Gulf, with the Brazil tariffs, the Maduro indictment and a contested Russia-sanctions track all landing inside seventy-two hours. Each is a reminder that the administration is spending attention on several fronts at once — which is itself a variable in how much bandwidth it can bring to a two-chokepoint war.
If America surges to Bab al-Mandeb, it does so beside China's only overseas base
Here is the geography almost no one is drawing. If Washington moves to secure the southern gate, it will operate from Camp Lemonnier — and roughly eight to twelve kilometres away sits the People's Liberation Army Support Base, China's first and only overseas military installation, opened in 2017 with a pier long enough for its aircraft carriers. The two rival militaries already share this small patch of Djibouti at the mouth of the strait, close enough that US personnel have previously reported lasers aimed at their aircraft from the Chinese side. Al Jazeera this year called Djibouti a new front in the war on Iran for exactly this reason.
Now layer it onto the oil map from Sunday's edition. The US blockade in the Gulf is already, in practice, throttling China-bound Iranian crude. A US surge to Bab al-Mandeb would put American escort and strike assets shoulder to shoulder with a Chinese base, at the precise moment Washington's maritime campaign is squeezing Beijing's energy supply. That is the quiet second front inside the second front: not Houthi missiles, but two great powers operating within artillery range of each other at a chokepoint one of them is trying to keep open and the other has a growing interest in seeing contested. It is the least-watched risk on the board — which, two days after the last least-watched risk became the headline, is worth taking literally.
Four calls for the days ahead
Probabilities are the desk's, not forecasts of what should happen. Escalation tilt retained until a concrete off-ramp exists. One call sits deliberately off-region.
Scoring — open board (graded daily; provisional until the window closes)
The desk named the southern gate on Sunday and the world walked through it on Monday; the harder truth is what stands behind it — a plan to hold the gate that is mostly paper, its ships pinned at the first chokepoint and its command post under fire, with a Chinese base watching from the far bank.
No financial advice is expressed or implied.
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